DEVICE FOR FIXING PIPES IN ROTOR OF BORING DEVICE von NEUPOKOEV V.G, GLUKH A.A, BOGOMOLOV R.M, STAROSTIN V.S

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DRILL BIT von NEUPOKOEV V.G, ISHCHUK A.G, BOGOMOLOV R.M, SUSLIKOV A.V, MOKROUSOV V.P, GAVRILENKO M.V, MOROZOV L.V

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BORING CUTTER WITH REINFORCED ARMOR OF CLAWS BACKS von NEUPOKOEV V.G, ISHCHUK A.G, BOGOMOLOV R.M, MOKROUSOV V.P, GAVRILENKO M.V, MOROZOV L.V

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METHOD OF ASSEMBLY OF ROLLER-CUTTER DRILLING BIT BEARING (VERSIONS) von TORGASHOV A.V, POPOV A.N, MATVEEV JU.G, NEUPOKOEV V.G, GOLOVKINA N.N

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CONE DRILL BIT von PANIN N.M, NEUPOKOEV V.G, ISHCHUK A.G, BOGOMOLOV R.M, MOKROUSOV V.P, MOROZOV L.V

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